Usage of solar-spouted bed drier in the drying of parboiled wheat, corn and pea

Download

index.pdf

Date

2010

Author

Tunaboyu, Ferihan

Metadata

Show full item record

Item Usage Stats

178
views

151
downloads

The main objective of this study was the application of solar energy for drying of parboiled wheat, corn and pea. Drying experiments were performed under open sun and also in the solar-spouted bed drier in which air heated by solar energy was used. The effects of these drying methods on drying rate and quality parameters were investigated for drying of parboiled wheat, corn and pea. The quality parameters evaluated were color, shrinkage, bulk density, apparent density, bulk and internal porosity, microstructure, pore size distribution, sphericity and rehydration ratio. For peas, ascorbic acid content was also measured. In solar-spouted bed drying, drying rates and effective diffusivity values for all samples were determined to be higher and therefore drying time was significantly lower as compared to open sun drying. Effective diffusivities were in the range of 0.30x10-10 m2/s - 0.65x10-10 m2/s for open sun and 1.35x10-10 m2/s - 3.65x10-10 m2/s for solar-spouted bed drying of different samples. In general, better quality parameters for solar-spouted bed dried samples were observed such as less shrinkage, higher rehydration capacities, more homogenous pore size distribution and higher ascorbic acid retention.

Subject Keywords

Solar energy

URI

http://etd.lib.metu.edu.tr/upload/12612927/index.pdf
https://hdl.handle.net/11511/20336

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Usage of solar-assisted spouted bed drier in drying of pea Şahin, Serpil; Şümnü, Servet Gülüm (2013-07-01) The main objective of this study is to evaluate the effects of solar-assisted spouted bed and open sun drying on the drying rate and quality parameters of pea. Color, shrinkage, bulk and apparent densities, internal and bulk porosities, rehydration capacity and microstructure were the quality parameters investigated in dried product.
Long-term effects of warming and nutrients on microbes and other plankton in mesocosms ÖZEN, ARDA; Sorf, Michal; Trochine, Carolina; Liboriussen, Lone; Beklioğlu, Meryem; Sondergaard, Martin; Lauridsen, Torben L.; Johansson, Liselotte S.; Jeppesen, Erik (Wiley, 2013-03-01) 1.We followed microbial and other planktonic communities during a 4-month period (FebruaryMay) in 12 outdoor flow-through mesocosms designed to elucidate the effect of global warming and nutrient enrichment. The mesocosms were established in 2003. 2.Warming had a smaller effect than nutrients on the biomass of the microbial and planktonic communities, and warming and nutrients together exhibited complex interactions. 3.We did not find direct effects of warming on the biomass of bacterioplankton or ciliates;...
Assessment of CO2 Storage Potential in Turkey, Modeling and a Prefeasibility Study for Injection into an Oil Field Okandan, Ender; Karakeçe, Yıldız; Cetin, Hayati; Topkaya, Ilhan; Parlaktuna, Mahmut; Akın, Serhat; Bülbül, Sevtaç; Dalha, Chantsalma; Anbar, Sultan; Cetinkaya, Ceyda; Ermis, Ismail; Yilmaz, Mustafa; Ustun, Volkan; Yapan, Kadri; Erten, A. Tayfun; Demiralin, Yasemin; Akalan, Ergun (2010-09-23) The large amount of CO2 that can be mitigated by geologic storage had gained interest during the last 15 years. Acceptance of CCS under CDM is still under discussion(IEA, 2008) however there are several pilot or field scale projects and monitoring surveys that are underway which will make the technology better known and resolve the risks involved. This study involves assessment of possible geologic sites for CO2 storage and calculation of CO2 emissions from thermal power plants with capacities > 500 MWe, ce...
Modelling and performance analysis of linear fresnel collector for process heat generation for ice cream factory in Konya Singh, Rahul; Baker, Derek Keıth; Tarı, İlker; Department of Mechanical Engineering (2017) In this thesis, a linear Fresnel collector has been designed to supply solar heat for industrial process. Firstly, optical analysis using ray tracing is done to determine the effects of collector’s parameters, such as height of receiver, mirror width and profile, gap between adjacent rows and slope deviation. Afterwards, one-dimensional thermal model is presented which predicts surface temperatures of receiver components and heat loss. The results obtained from both optical and thermal studies are then benc...
Investigation of olive mill sludge treatment using a parabolic trough solar collector Ben Othman, Fares; Eddhibi, Fathia; Bel Hadj Ali, Abdessalem; Fadhel, Abdelhamid; Bayer, Özgür; Tarı, İlker; Guizani, Amenallah; Balghouthi, Moncef (2022-01-15) The olive mill sludge treatment system developed in this study is an indirect solar dryer driven by a solar parabolic trough collector (PTC). A heat exchanger is implemented to heat air with hot oil coming from the solar collector. The developed hot air dryer can treat up to 50 kg of olive mill sludge distributed over six trays at once. The designed system and its components are described, along with their experimental and simulated performance evaluations. With a mean direct normal irradiation (DNI) higher...

Citation Formats

F. Tunaboyu, “Usage of solar-spouted bed drier in the drying of parboiled wheat, corn and pea,” M.S. - Master of Science, Middle East Technical University, 2010.